Noncontrolling Interest (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended							12 Months Ended					0 Months Ended
	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Noncontrolling Interests	Dec. 31, 2012 Noncontrolling Interests	Oct. 02, 2013 Rest Assured LLC	Sep. 30, 2013 Rest Assured LLC
Noncontrolling Interest
Acquisition of remaining noncontrolling interest (as a percent)													33.30%
Ownership interest held by parent (as a percent)														66.70%
Noncontrolling Interest
Balance at the beginning of the period			$ (99)					$ (99)			$ (99)	$ 11
Net loss-noncontrolling interest	(34)	(40)	(36)	(25)	(24)	(31)	(30)	(110)	(110)	(171)	(110)	(110)
Acquisition of remaining noncontrolling interest during period											(209)
Balance at the end of the period				$ (99)					$ (99)			$ (99)